It's probably either accidentally hitting the Caps Lock button, or turning
on StickyKeys. For StickyKeys, go to StartHelp and look up StickyKeys.

HTH
Ed

"malissamartinwilke" wrote in
message ...
I keep hitting some combination of keys while I'm typing that reverses the
functions of capitalization. What am I doing? When it happens, how do I
turn off whatever it is I've done? Thanks.